summaryrefslogtreecommitdiff
path: root/indra/newview/llvograss.h
blob: 28203c65aeab1d6c6aaf204661cf1d28f243b735 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
/** 
 * @file llvograss.h
 * @brief Description of LLVOGrass class
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLVOGRASS_H
#define LL_LLVOGRASS_H

#include "llviewerobject.h"
#include <map>

class LLSurfacePatch;
class LLViewerTexture;


class LLVOGrass : public LLAlphaObject
{
public:
	LLVOGrass(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp);

	// Initialize data that's only inited once per class.
	static void initClass();
	static void cleanupClass();

	virtual U32 getPartitionType() const;

	/*virtual*/ U32 processUpdateMessage(LLMessageSystem *mesgsys,
											void **user_data,
											U32 block_num, 
											const EObjectUpdateType update_type,
											LLDataPacker *dp);
	static void import(LLFILE *file, LLMessageSystem *mesgsys, const LLVector3 &pos);
	/*virtual*/ void exportFile(LLFILE *file, const LLVector3 &position);

	void updateDrawable(BOOL force_damped);

	/*virtual*/ LLDrawable* createDrawable(LLPipeline *pipeline);
	/*virtual*/ BOOL		updateGeometry(LLDrawable *drawable);
	/*virtual*/ void		getGeometry(S32 idx,
								LLStrider<LLVector4a>& verticesp,
								LLStrider<LLVector3>& normalsp, 
								LLStrider<LLVector2>& texcoordsp,
								LLStrider<LLColor4U>& colorsp, 
								LLStrider<U16>& indicesp);

	void updateFaceSize(S32 idx) { }
	/*virtual*/ void updateTextures();											
	/*virtual*/ BOOL updateLOD();
	/*virtual*/ void setPixelAreaAndAngle(LLAgent &agent); // generate accurate apparent angle and area

	void plantBlades();

	/*virtual*/ BOOL    isActive() const; // Whether this object needs to do an idleUpdate.
	/*virtual*/ void idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time);

	/*virtual*/ BOOL lineSegmentIntersect(const LLVector4a& start, const LLVector4a& end, 
										  S32 face = -1,                        // which face to check, -1 = ALL_SIDES
										  BOOL pick_transparent = FALSE,
										  S32* face_hit = NULL,                 // which face was hit
										  LLVector4a* intersection = NULL,       // return the intersection point
										  LLVector2* tex_coord = NULL,          // return the texture coordinates of the intersection point
										  LLVector4a* normal = NULL,             // return the surface normal at the intersection point
										  LLVector4a* tangent = NULL           // return the surface tangent at the intersection point
		);

	static S32 sMaxGrassSpecies;

	struct GrassSpeciesData
	{
		LLUUID	mTextureID;
		
		F32		mBladeSizeX;
		F32		mBladeSizeY;
	};

	typedef std::map<U32, GrassSpeciesData*> SpeciesMap;

	U8				mSpecies;		// Species of grass
	F32				mBladeSizeX;
	F32				mBladeSizeY;
	
	LLSurfacePatch           *mPatch;			//  Stores the land patch where the grass is centered

	U64 mLastPatchUpdateTime;

	LLVector3		          mGrassBend;		// Accumulated wind (used for blowing trees)
	LLVector3		          mGrassVel;		
	LLVector3		          mWind;
	F32				          mBladeWindAngle;
	F32				          mBWAOverlap;

protected:
	~LLVOGrass();

private:
	void updateSpecies();
	F32 mLastHeight;		// For cheap update hack
	S32 mNumBlades;

	static SpeciesMap sSpeciesTable;
};
#endif // LL_VO_GRASS_